Multi-channel reactions of composite nuclei
29 June-10 July
Towards high precision in multi-channel reactions of composite nuclei
Organizers: J. Kirscher (New Uzbekistan Univ., contact), M. Schäfer (Czech Academy of Sciences), E. Hiyama (RIKEN Nishina Center)
Talks and seminars during the first week (29/06 – 03/07); working group: 6-10 July
Low-energy reactions of composite nuclei are relevant for both technical and basic-science applications, and it remains a fundamental problem to reduce the uncertainties in their theoretical description. These uncertainties originate in a complicated interplay between strong and electromagnetic interactions at the low energies of interest where neither of the two can be neglected.
This project is held at a period at which the organizers deem the advancement in numerical techniques and algorithms, and the understanding of refining the nuclear interaction systematically sufficient to explore with reliable error estimates many ideas and hypotheses on how to affect reaction cross sections. To be specific in their goal, the organizers of the working group aim for theoretical predictions of reaction cross sections of composite nuclei with nucleons as degrees of freedom. Projectiles, targets, and reaction products are thus few-nucleon systems, and their formation in asymptotic states, their distortion and rearrangement in the collision process shall all be described with the same nuclear theory.
Goals of the project
1. Experimentalists and theoreticians shall identify key reactions
[i] to benchmark the accuracy of the numerical methods employed, i.e., a list of reactions measured with high precision,
[ii] to test the usefulness of interaction theory and numerical methods, i.e., reactions whose measurements are imprecisely known experimentally, and
[iii] to propose future experiments where the framework to be developed can demonstrate its predictive power and trustworthiness for applications in astrophysics, fusion research, and other fields where experiments are either unfeasible or too costly.
2. Development of a roadmap to integrate the latest advances in the understanding of systematically improvable interaction theories for systems close to unitarity, with the most sophisticated numerical techniques to solve the quantum few-body problem.
3. Transfer of knowledge and experience in overcoming the problems associated with composite multi-channel reactions when both short- and long-range Coulomb forces are relevant and act perturbatively and nonperturbatively.
4. Assess the potential of hypotheses about how to increase the yield of nuclear fusion reactions with state-of-the-art interaction theories and numerical methods.
5. Tailor the latest advances in the design of effective field theories in the form of so-called improved actions to the problem of composite multi-channel reactions.
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Création-contact Web ESNT : Valérie Lapoux
